JPG and JPEG are the same photo formats. No distinction between a .jpg photo and a .jpeg photo — both formats apply the identical JPEG compression standard and save image data in the same way.
The difference is purely in the suffix, as it is a relic from the early days of computing. JPEG was created in 1992 by the Joint Photographic Experts Group. When Microsoft introduced early versions of Windows, the system imposed a limitation: extensions were limited to be 3 characters.
This forced the 4-character .jpeg extension to be shortened to .jpg for Windows users. Mac and Unix systems, not having this three-character restriction, could use the complete .jpeg extension from the beginning.
Even though both extensions work identically in nearly all current applications, there are specific scenarios where a service might need the .jpeg extension. When this happens, changing the extension from .jpg to .jpeg is all that is needed.
No actual file conversion is required — only renaming the extension solves the get more info compatibility concern usually.
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